How to build the highest bridge of the world Millau Viaduct (fr. Le Viaduc de Millau)
Millau Viaduct (fr. Le Viaduc de Millau) - cable-stayed road bridge, passing through the valley of the river Tarn near Millau in southern France. The authors of the project are French bridge engineer Michel Virlozho known extent of the project of the second cable-stayed bridge in the world - the bridge of Normandy and the English architect Norman Foster, who is also the author of airport projects in Hong Kong and the restoration of the Reichstag in Berlin. This is the highest traffic bridge in the world, one of its pillars has a height of 341 meters - slightly higher than the Eiffel Tower and only 40 meters lower than the Empire State Building. The bridge was officially opened on 14 December 2004 and opened to traffic December 16, 2004.
The bridge is edit out vosmiproletnogo steel roadway supported by eight steel columns. Roadway weighs 36,000 tons and has a length of 2460 meters and a width of 32 meters and a depth of 4, 2 meters. Each of the six central spans has a length of 342 meters, the two extremes - at 204 meters long. The road has a slight slope of 3% descending from south to north, and the curvature radius of 20 kilometers, to give drivers a better view.
Movement is carried out in two lanes in each direction. The height of the columns varies from 77 to 246 meters, the longest diameter of the column 24, 5 meters at the base and 11 meters from the roadway. Each support consists of 16 sections, each section weighing 2230 tonnes. Sections were collected on site from pieces weighing 60 tons, 4 meters wide and 17 meters long.
Each of the pillars supporting pylons height of 97 meters. First, the column was collected, together with the temporary support, then part of canvas were put forward through the support by means of hydraulic jacks controlled by satellite, to 600 millimeters every 4 minutes.